Underworld, a band best known for “BornSlippy” (a.k.a. that slammin’ techno song they play at the end of Trainspotting), are back after a two-year hiatus. Their new release, lovely broken thing,is a 26-minute explosion of electronic beats, sounds, and conversationsthat’s only available as a download. Don’t let that prevent you from checking outthe hypnotic voices on the first track “JAL to Tokyo.”